TT
CC
Section 3. Overhead
Service
able
ontents
able
ofof ontents
Section 3
Overhead Service
A.GENERAL........................................................................................................................... 3-3
B.
TEMPORARY CONSTRUCTION SERVICE................................................................... 3-3
C.
SECONDARY SERVICE (600 VOLTS AND UNDER)................................................... 3-5
D.
PRIMARY SERVICE - INDIVIDUAL RESIDENCE...................................................... 3-18
E.
RESIDENTIAL PLAT & SUBDIVISION - LINE EXTENSION.................................... 3-20
F.
CONVENIENCE POLES.................................................................................................. 3-20
G.
SERVICE POLES.............................................................................................................. 3-20
H.
METER POLES................................................................................................................. 3-20
I.
AREA LIGHT - OVERHEAD FEED - RESIDENTIAL.................................................. 3-25
J.
MISCELLANEOUS POLE ATTACHMENTS................................................................ 3-26
Electrical Service Requirements
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Revised 09/14/2015
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T
I
able
of Service
llustrations
Section 3.
Overhead
and
Tables
Section 3
Illustrations And Tables
FIGURE 3-1
TEMPORARY OH CONSTRUCTION SERVICE.......................................... 3-4
FIGURE 3-2
SERVICE CLEARANCE.................................................................................. 3-6
FIGURE 3-3
MINIMUM SERVICE CLEARANCES........................................................... 3-7
FIGURE 3-4
SERVICE MAST BRACKET........................................................................... 3-8
FIGURE 3-5
DEADEND HOUSE BRACKET...................................................................... 3-8
FIGURE 3-6
KINDORF / UNISTRUT BRACKET............................................................... 3-8
FIGURE 3-7
HEAVY DUTY SERVICE BRACKET............................................................ 3-8
FIGURE 3-8
OH MAST SURFACE MOUNTING SPECIFICATIONS............................... 3-9
FIGURE 3-9
OH MAST FLUSH MOUNTING SPECIFICATIONS ................................. 3-10
FIGURE 3-10 GUYING / BRACING OH SERVICE MASTS.............................................. 3-11
FIGURE 3-11 MASTHEAD WALL MOUNTING SPECIFICATIONS............................... 3-12
FIGURE 3-12 MAST LOCATION ACCESSIBILITY.......................................................... 3-14
FIGURE 3-13 ALTERNATE MAST STRIKE LOCATION................................................. 3-15
FIGURE 3-14 OH CT ENCLOSURE / 201 - 400 AMP......................................................... 3-16
FIGURE 3-15 OH MAST SURFACE MOUNTING / 201 - 400 AMP.................................. 3-17
FIGURE 3-16 CLEARING FOR OH LINE EXTENSION.................................................... 3-19
FIGURE 3-17 METER POLE CLEARANCES (JOINT OCCUPANCY)............................. 3-21
FIGURE 3-18 TYPICAL METER POLE INSTALLATIONS............................................... 3-23
FIGURE 3-19 METER POLES – OVER 200 AMP............................................................... 3-24
FIGURE 3-20 AREA LIGHT - OVERHEAD FEED - RESIDENTIAL................................ 3-25
FIGURE 3-21 CATV POWER SUPPLIES............................................................................. 3-27
FIGURE 3-22 TEMPORARY POLE ATTACHMENT......................................................... 3-28
FIGURE 3-23 UNMETERED POWER SOURCE................................................................. 3-29
TABLE 1
METER POLE SPECIFICATIONS AND SETTING DEPTH....................... 3-22
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Section 3. Overhead Service
OVERHEAD SERVICE
A.GENERAL
1. All conditions for service application, availability of service, type of service,
inspection, right-of-way, easements, etc., are covered in Section 2, General
Requirements.
2. The District will determine when it will extend its overhead distribution facilities to
serve permanent residential or commercial customers.
3.The customer shall do all tree trimming on private property necessary for safe construction and operation of the District’s electrical facilities, prior to construction.
B.
TEMPORARY CONSTRUCTION SERVICE
1. When a service is determined by the District to be temporary, the customer is required
to pay charges in accordance with the District's Customer Service Regulations.
2. Temporarary service installations shall be on private property.
3. Temporary services are limited to 18 months.
4. Temporary service conductors include a maximum of 150' of District supplied #6
aluminum secondary service conductor.
5. Access must be provided by the customer between the service attachment and the
District’s facilities.
6. The preferred location of a temporary service shall be accessible by a District service
truck within 15 feet of a drivable surface.
7.The service equipment shall include a suitable support post and bracing with an
approved attachment insulator spool, UL listed or approved conduit and weatherhead,
meter socket, weatherproof disconnect switch and receptacle box with #4 copper
ground wire, clamp and ground rod.
8. A minimum of a 4" x 4" timber 14' in length will be accepted if braced a minimum
of two ways. Refer to Figure 3‑1. Temporary service equipment on trees or the
District's distribution, transmission or street light poles is not acceptable.
9.The meter socket shall be an approved type, meeting the requirements of the National
Electrical Code and the District’s requirements. Water pipe or water pipe fittings are
not acceptable. Service entrance cable may be used where permitted by state or city
regulations.
10. The neutral wire between the weatherhead and switchbox shall be bonded to the meter socket using the grounding screw or bonding terminal.
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Section 3. Overhead Service
11. If temporary is accessible by a District service truck (within 15 feet of a driveable
surface) a minimum of 18 inches of line side wire shall be left for connection at the
weatherhead. If temporary is not accessible by a District service truck the customer
shall attach the line side wire to the attachment insulator spool and leave enough line
size wire to reach the ground for attachment to the District provided service wire.
12. The service conductors shall be coded and the neutral conductor shall be identified
by the color white or light gray. The ground wire shall be a minimum of #8 AWG
copper.
13.The point of attachment shall be high enough above the ground to provide the proper
clearances. Refer to Figure 3-3.
14. Service entrance equipment shall include proper provisions for grounding portable
tools and equipment in accordance with the National Electrical Code and such
equipment shall be of factory built, rain-tight construction when exposed to the
weather.
15. The District will provide the service drop, make appropriate connections and install
the meter(s).
16. The District will not energize service until the installation is approved by the
appropriate electrical inspector.
Figure
3-1
TEMPORARY
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Section 3. Overhead Service
C. SECONDARY SERVICE (600 VOLTS AND UNDER)
1. Service drop conductors will not be installed until all electrical inspections have
been completed and approved by the District and the governmental agency having
jurisdiction.
2.The service entrance shall be located so that only one set of service wire attachments
(of like voltage) will be required.
3.
The District will designate the point of attachment for all service drop conductors
and the location of the service entrance equipment. When a pole is required for
the customer’s convenience, the cost and condition shall be in accordance with the
District’s Customer Service Regulations.
4. Service Clearing
a. Remove trees and limbs a minimum of 5 feet on all sides of proposed service
drop route. This is to be maintained by the customer, contact Customer
Engineering for possible assistance. The District will trim the first 10' nearest it's
Primary High Voltage Line(s). Refer to Figure 3-2.
b. Remove leaning trees beyond the 5 feet minimum on each side which constitute a
potential hazard to the proposed line.
c. It is recommended that any trees that may present a future hazard to the service
wire (i.e., rotting, dead, or leaning trees that may fall or be blown down) should
be removed.
d. Should it be necessary to run a service drop through a more congested area than
described above, it is the customer's responsibility to top or remove all trees or
obstacles taller than 12-1/2 feet within the service drop area.
Exception:
Very large Evergreen (i.e., Fir and Cedar) may be left if mutually
agreed upon by the customer and the District representative. No
variance form required. Side trimming is required.
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Section 3. Overhead Service
Figure 3-2
SERVICE CLEARANCE
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Section 3. Overhead Service
5. Minimum Service Clearances
a. Where the roof is readily accessible and the service voltage is 120/240V the
service drop conductors shall have a clearance of not less than 10 feet from the
highest point of the roof over which it passes. Where the roof is or is not readily
accessible and the service voltage is 277/480V the service drop conductors shall
have a clearance of not less than 10 feet from the highest point of the roof over
which it passes. NESC 234.C.3.d.(1). However, the clearance may not be less
than 3 feet where the voltage between conductors does not exceed 300 volts
and the roof is not readily accessible or cannot be readily walked upon. These
clearances shall be maintained except within 4 feet of the point of attachment.
Reference NESC 234 .C.3.d.(1).
b.The service attachment bracket shall be a minimum of 10 feet above the ground
at the point of attachment and high enough to maintain a service conductor
clearance of 10 feet over a finished grade or working platform, 15-1/2 feet
over residential driveways*, 18 feet over city, county or private roads, streets,
alleys and all driveways other than residential, and 24 feet over State highways.
The point of attachment shall not be more than 17 feet above the grade unless
specifically approved by the District. Refer to Figure 3-3 and Figure 3-12.
* EXCEPTION:
Where the height of attachment to a building or other installation does not permit 15-1/2 feet of clearance,
clearances over residential driveways may be reduced to 12 feet for supply service drops limited to 150 volts to ground (NESC 232-1).
MINIMUM SERVICE CLEARANCES
F
Figure
igure 3-3
Clearances
Overhead, 600 Volts or Less
Service Drop
District
Facilities
Point of
attachment
Min.
24 FT
State Highways
Min.
18 FT
*Min. 15-1/2
City, County road
Private road
Commercial driveways
Truck traffic areas
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FT
Residential
driveway
Min. 10 FT
Building
Final Grade
Porch / Deck
Working Platform
Section 3. Overhead Service
6.The customer shall furnish and install all required service brackets for wall or mast
mounting. When the circumstance is such that the District must run larger than 1/0
service wires, the customer shall install a heavy-duty service rack. Refer to Figure
3-7.
Figure 3-4
service mast bracket
(trunnell)
Figure 3-5
deadend plate bracket
(strike plate)
Figure
igure 3-3
3-6
F
kindorf/unistrut
bracket
Figure
igure 3-3
3-7
F
heavy duty service bracket
Approved Brands:
Florida Wire & Cable................ FW768 w/3 - FW151
McGraw (Cooper).....................DR1F8
AB Chance................................ C207-0052 w/3 - C909-1032
Porcelain Products....................4038
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Section 3. Overhead Service
7.The service mast shall consist
of a minimum 2 inch rigid
galvanized steel conduit
and must have a lead ring
or neoprene type flashing
at the roof line. Two “U”
bolts spaced at least 2 feet
apart shall be required to
attach all mast services. If
a coupling is used, it must
be located at least 3 feet
below the wall plate and “U”
bolts must be installed near
the wall plate and as close
to the top of the coupling
or reducer as possible.
There shall be no couplings
above the plate unless the
distance between the lower
couplings and weatherhead
exceeds 10 feet. In such
situations, an additional
guy attached immediately
above the coupling shall be
required. Refer to Figure 3‑8,
3-9 and 3-10.
Figure
igure 3-3
3-8
F
SURFACE MOUNT
Note: Refer to State of
Washington, Department
of Labor and Industries,
Electrical Inspection
Division, Rules and
Regulations for specifics on
service mast installations,
WAC 296-46B-230.
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Section 3. Overhead Service
NOTE: Mast guying or
bracing is required
if the mast exceeds
26 inches above
the roof line or if
the service drop
is longer than 100
feet. WAC 29646B-230.
Figure
igure 3-3
3-9
F
FLUSH MOUNT
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Section 3. Overhead Service
Top View - Guys
Guy attachment plate
as detailed or equal.
Pull
Service
Drop
9/32'' hole
5/8''
45°
1-1/4''
1-1/2''
2''
1/2'' hole
Guy Attachment Plate Detail
8'' Min.
Figure 3-10
Customer owned
condutor 18" Minimum.
PU
D
6'' Max.
PU
PUD
Service Drop
Collars, ''Cyclone'' fence or
equal with 3/8'' min. bolts
D
45°
Flashing
3/4'' rigid steel galv. conduit with
ends flattend and drilled. Lower
end to have sharp bend with no
radius.
1/4'' x 4'' x 4''
galv. plate washer.
GUYING / BRACING
Top View - Braces
Braces 60° to 90°
apart and
symmetrical about
this centerline
Secure conduit to rafter
with min. 5/6'' U-bolt.
NOTE: Mast guying or bracing is required if the mast exceeds 26 inches above
the roof line or if the service drop is longer than 100 feet. WAC 29646B-230.
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Pull
Service
Drop
Section 3. Overhead Service
Figure 3-11
MASTHEAD WALL MOUNTING
8.Non-metallic conduit may be used for service entrance conductors
where the service
bracket or other point of
attachment for service
drop conductors is not
attached to the conduit
and is on the outside
lines of the building.
Refer to Figure 3-11.
9. Where there is no problem with roof
clearances, mast type
services must have a
minimum height of 18
inches extending above
the roof to the point of
attachment.
10. Approved metal strike
plate, complete with
insulator attached,
shall have corrosionresistant carriage bolts
of not less then 3/8 inch
diameter. Refer to Figure 3-11.
11. For a duplex or larger building where only
one strike to the
building is permitted
but more than one
weatherhead is desired,
the weatherheads must
terminate within 18
inches of each other.
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Section 3. Overhead Service
12. Only three conduits per service entrance shall be used unless written permission
is obtained from the District by using the District’s Variance Application. Refer to
Section 2. Two of the masts shall be within 18 inches of the central mast attachment
point.
13. Weatherheads are required on all overhead service conduits.
14. The practice of attaching a strike plate to the barge board and fanning the conductors
above the edge of the roof to connect to a service mast will not be permitted. Strike
plate attached directly to the roof is not acceptable.
15. Unfused service conductors within a building or structure shall be installed in metallic
raceways, other than electrical metallic tubing, permitted in Section 230-43 of the NEC
or in schedule 80 rigid non-metallic conduit. The raceway shall extend no more than 15
feet inside the building or structure. Reference WAC 296-46. Install conduit per NEC
300-4 requirements.
16. The District will run the secondary service and make permanent service connections,
furnish and install meters.
17. Service masts, weatherheads and strike plates must be permanently and safely
accessible. If a service mast cannot be reached by a District service truck then it must
be located:
a. 17 feet or less above the ground or ladder base and less than 18 inches from the edge of the roof (refer to Figure 3-12),
Note: If a ladder is to be used there must be a firm, level surface and enough clearance at the base of the ladder to allow a ratio of 4:1 (1 foot out from the top support or wall for every 4 foot in working length or height) or a 75-degree pitch for ladder safety.
Where the service insulator is 4 feet from the edge of the roof and 18 inches above the roof or 3 feet from the edge of the roof and not higher than 4 feet above the roof it may be worked from a ladder.
or
b.
the the service insulator can not exceed 6 feet above the roof and the roof must be able to be walked on and worked on safely. Roofs not acceptable to the District are roofs with pitches 4:12 or greater and roofing that may be easily damaged like soft tile, metal, glass or fiberglass. Also, any roof that the District inspector considers unsafe, deteriorated or not structurally sound is unacceptable.
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Section 3. Overhead Service
MAST LOCATION / ACCESSIBILITY
Figure 3-12
18. WAC 296-155-24510 requires employees exposed to a hazard of falling from a
location 10 feet or more in height to be protected by fall restraint, fall arrest systems or
positioning device systems.
Due to the above requirement, in some cases, such as when a roof or shed extension
has been added and the District can not reach the strike point either by ladder in
compliance with current strike requirements, or by bucket truck, it will be necessary
for the customer to install a new strike point and new conductor to allow the District
to reach the location in compliance with current regulations and requirements. The
customer will also need to secure an electrical inspection and approval of the work
done from the appropriate jurisdiction before the District can make permanent
connections at the new strike location. Refer to Figure 3-13.
When possible, and safety is not an issue, such as in the case of partial power, the
District will temporarily leave the service energized to avoid disconnecting the service
to the customer. However in some instances where a safety hazard exists, for example,
a bad neutral, the District will need to immediately disconnect the service until such
time as the customer has completed the necessary repairs and obtained the required
approvals to reconnect the service. Coordination of the transfer of service or the
connection of the new service will need to be arranged through the District’s Customer
Engineering Department
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Section 3. Overhead Service
ALTERNATE MAST STRIKE LOCATION
Figure 3-13
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Section 3. Overhead Service
.
19. For single phase services 201 to 400 amperes, a 400 ampere meter base for a class 320
meter with link by-pass is preferred. When current transformer enclosures are used, the
following requirements apply:
a. The current transformers shall be mounted in a raintight enclosure on the outside
of the building. Refer to Figures 3-14 and 3-15.
b. Indoor type current transformers are furnished and installed by the District.
c. Mast mounted current transformers are no longer allowed for new installations.
Any major alterations on existing services using this type of metering shall be
rebuilt utilizing an outdoor enclosure.
d. Wall mounted current transformers are no longer allowed for new installations.
Any major alterations on existing services using this type of metering shall be
rebuilt utilizing an outdoor enclosure.
e. For detailed requirements refer to Section 5-L.
Figure 3-14
OH CT ENCLOSURE / 201 - 400 AMPS
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Section 3. Overhead Service
Figure 3-15
OH MAST SURFACE MOUNTING / 201 - 400 AMPS
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Section 3. Overhead Service
D.PRIMARY SERVICE - INDIVIDUAL RESIDENCE
(Refer Also to Sec. 2 Item N)
1. The plot plan provided by the customer will show the desired location for the service
entrance and metering equipment (to be approved by the District prior to construction)
and any special conditions affecting pole or wire locations. This includes objects such
as wells, pools, hot tubs, utilities, buildings and driveways.
2. The District will design and install the complete overhead distribution system. 3. Clearing for Primary Lines on Private Property
a. The customer will provide and permanently maintain a road with adequate
base and size to support the heavy equipment required for line construction and
maintenance, adjacent to the poles, prior to construction.
b. The customer will remove all trees a minimum of 5 feet on each side of a
proposed single phase line location or 10 feet on each side of a proposed three
phase line, as staked by the District's engineer. Refer to Figure 3–16.
c. The customer will remove or top below the wire height leaning trees which the
District representative constitutes as a potential hazard to the proposed line.
d. The customer will remove or top below the wire height all overhanging branches.
e. The customer will remove low growing trees, which by their location could in the
future constitute a hazard to the proposed line.
f.
The customer will remove debris that is hazardous to construction personnel.
4. The District will maintain tree trimming for existing primary lines.
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Section 3. Overhead Service
5' min.
10' min.
5' min. 1Ø
10' min. 3Ø
50'
Figure 3-16
CLEARING FOR OH LINE EXTENSIONS
PUD
PUD
Before preparation for line extension.
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After preparation for line extension.
Section 3. Overhead Service
E.
RESIDENTIAL PLAT & SUBDIVISION - LINE EXTENSION
1. The customer will advance cost of the line, including any special costs incurred in
obtaining permits, easements or other documents, clearing or other special costs.
2. The District will design, install, own and maintain the complete overhead distribution
system.
F.CONVENIENCE POLES
1. When requested by the customer for their specific benefit, the District may furnish and
install a 35' convenience pole, with or without guying and anchoring, at the customer's
expense.
2. Poles longer than 35 feet may be provided on an individual cost basis.
3. The customer shall advance the required fees prior to final engineering and
construction.
4. The District shall install, own and maintain convenience poles.
G.SERVICE POLES
1. The District shall install, own and maintain service poles as necessary to provide
adequate clearance and support of the service conductors.
H. METER POLES
1. When requested by the customer, the District may furnish and install a 35' meter pole,
with or without guying and anchoring, at the customer's expense.
a. The customer shall provide an adequate road-like surface for the District's heavy
equipment required for the installation of the pole.
b. The customer shall be liable for personnel injuries, vehicle damage and crew
time loss caused by an inadequate access.
2.The meter pole will be the property of the customer.
3. When the meter pole is to be replaced, the customer shall, at his or her expense,
transfer all customer-owned service entrance equipment to the new pole.
4. Permanent safe walking access shall be provided and maintained by the customer
to meter poles that have District equipment on them, e.g., meter and service wires.
Refer to Section 2-N.
5. Neither trees nor the District’s distribution or transmission poles shall be used as
meter poles.
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Section 3. Overhead Service
6.
When
a pole is used as a metering point and central distribution center and the
conductors beyond the metering point are subject to contact with machinery, the
customer is required to install a main disconnect switch on that pole.
7.Meter poles shall be installed and sized to provide the clearances as detailed in Figures
3-3 and 3-17.
Figure 3-17
METER POLE CLEARANCE
(JOINT OCCUPANCY)
8. Meter poles meeting District requirements may be customer furnished and installed.
9. Either cedar or fir poles may be used, provided fir poles are full length pressure treated,
and cedar poles are butt treated in accordance with American Wood-Preservers'
Association Standards.
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Section 3. Overhead Service
10. Outer bark must be completely removed from all meter poles. The pole, with
minimum requirements as listed below, shall be set at the proper depth and backfilled
with rocks and soil. Backfill shall be tamped to provide a sound installation.
Table 1
Meter Pole Specifications and Setting Depth
6
20 ft
Pole Class
4
Setting
Depth
(Firm Soil)
4’
Minimum
Circumference 6’ from Butt
Fir
Cedar
25"
27"
Minimum
Circumference at Top
21"
25 ft
4
5’
27.5"
30"
21"
30 ft
4
5’
29.5"
32.5"
21"
11. All wood meter poles shall have a 2" wide, 1/2" deep gain 12' up from bottom of pole.
12. Other than wood poles will be considered and evaluated on an individual basis. These
poles shall have a gain identification mark or tag at 12' up from bottom of pole or as
designated by the District.
13. Location and inspection of the meter pole shall be approved by a District
representative prior to installation. 14. The customer is responsible for having the pole hole inspected by the District for
proper depth. This inspection shall be made prior to setting the pole, after the hole
is prepared and the meter pole is on site.
15. The District will not connect to any customer-installed meter pole that has not been
inspected and accepted by the District.
16. The customer shall be responsible for anchoring/guying of a customer installed meter
pole, to withstand the pull imposed by the District’s service conductors. A District
Engineer will inform the customer if the pole requires anchoring and guying. An
anchor and guy will typically be required for services over 125' or with an angle of
15° or more in the service run. The District will not connect to any meter pole that is
unstable or in any way does not conform to this Standard.
17. The thru-bolt type insulator bracket installed by the customer shall be located 8" below
and 45° from the weatherhead, facing the point of attachment to the District facilities.
The insulator shall be mounted high enough above ground to provide adequate
conductor to ground clearances for the District’s service drop. Refer to Figure 3-3 and
3-17.
18. Relocations of the meter pole may be done at the customer’s request on an individual
cost basis.
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Section 3. Overhead Service
Figure 3-18
TYPICAL METER POLE INSTALLATIONS
O/H RV Svs.
O/H - U/G
O/H - O/H
District Service Wires
12'' Max.
Customer Owned
18'' Min. Leads
Typical
8'' Min.
Schedule 40 or 80
PVC or rigid steel
conduit.
Customer Owned
Per NEC
Pole Gain Typical
Refer to Sect. 3-H.
Meter Socket
Meter Socket
Neutral Bond
Neutral Bond
Disconnect
per
NEC
Disconnect
per
NEC
48'' Min.
72'' Max.
18''
12'
Customer Owned
Per NEC
6''
Setting Depth
refer to Table 1
Sect. 3-H.
Ground
per NEC
Ground
per NEC
6'
6'
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Ground
per NEC
6'
Section 3. Overhead Service
19. Pole mounted current transformers are not allowed for new installations. Any major
alterations on existing services using this type of metering shall be rebuilt utilizing
a 400 amp rated meter socket for a class 320 meter or outdoor current transformer
enclosure. Refer to Figure 3-19.
Figure 3-19
METER POLES - OVER 200 AMP
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Section 3. Overhead Service
I. AREA LIGHT - OVERHEAD FEED - RESIDENTIAL
1. District Responsibilities:
a. Determine availability of service and coordinate the location of the area light
with the customer.
b. There must be an existing transformer available to serve the light. If there is
no existing transformer the District can install a transformer at the customer's
expense.
c. Light will be placed on existing District wood poles only.
d. Poles may be set in areas of unrestricted public access, contact the District for
information.
2. Customer Responsibilities:
a. Meet with District representative to determine availability of service and location
of the area light.
b. Complete and sign (property owner only) Application to Contract with the
District for Area Lighting Service Form No. 1008.
c. Provide access for the District's equipment for installation and maintenance.
Figure 3-20
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Section 3. Overhead Service
J. MISCELLANEOUS POLE ATTACHMENTS
1. Pole Attachments prohibited for Utility Poles
RCW: 70.54.090 provides that:
"It shall be unlawful to attach to utility poles any of the following: Advertising signs,
posters, vending machines, or any similar object which presents a hazard to, or
endangers the lives of, electrical workers. Any attachment to utility poles shall only
be made with the permission of the utility involved, and shall be placed not less than
twelve feet above the surface of the ground."
a. The types of unlawful attachments shall include, but are not limited to neighborhood watch signage, lost pet signage, information or regulatory signage, banners, flags, mailboxes, basketball hoops or any similar objects.
b. It is the District's practice not to permit attachments to utility poles.
2. CATV - Power Supplies
a. Maximum size cabinet shall be 26'' wide x 36'' high x 16'' deep and weigh 500
pounds or less. The cabinet shall be 14 gauge metal painted to resist exposure
and to prevent rust.
b. Battery pac auxiliary power supplies shall have batteries in the assembly which
have flame arrestor vent caps and shall be protected from electrical spark by
having separate metal containers. The battery containers and the cabinet shall be
well vented.
c. The unit shall be designed to operate from connection to a 120 volt single phase
District secondary. Its circuitry shall include a 15 amp 120 volt rated breaker and
back-feed voltage protection to prevent power from the unit being routed into the
District’s system.
d. The battery pac auxiliary power supply unit shall be stand-off mounted such that
it is situated in-line with the lead of the pole line. There shall be a minimum 5
inches clearance between the power supply housing and the pole to which it is
mounted.
e. The battery pac auxiliary power supply housing shall be effectively grounded to
a grounding system installed by the cablevision company. Ground rod(s) shall
be installed a minimum 18 inches from the base of the pole on which the power
supply unit is mounted.
f.
The Schedule 40 PVC service conduit, capped with a weatherhead, shall be
mounted on face of pole and shall terminate 8 inches above the level of the
District’s overhead secondary attachment or neutral position. Maximum conduit
size is 1-1/2".
g. For standard mounting height, refer to Figure 3-21. Submittal of an “Application
for Variance” is required.
Electrical Service Requirements
New: 10/90
Revised 9/14/2015
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Section 3. Overhead Service
h. Only qualified District employees or District contractors shall connect auxiliary
power supply unit service wires to the District secondary power lines.
i
In the event that it is necessary to replace or relocate a pole on which an auxiliary
power supply unit is mounted, the cablevision company shall transfer or relocate
the unit at no cost to the District.
j.
In addition to the standard attachment fee, the cablevision company shall pay the
District a flat rate to cover the cost of providing electrical service to the auxiliary
power supply unit.
3. Unmetered Power Source - refer to Figure 3-22 for materials.
Refer to the District’s Rate Schedule 23 for limited availability. This schedule is
Figure 3-21
CATV POWER SUPPLIES
Electrical Service Requirements
New: 10/90
Revised 09/14/2015
Page 3 - 27
Section 3. Overhead Service
available for nonmetered service to television cable amplifiers, air traffic warning
lights, and other such applications where metering is deemed impractical by the
District.
a. Contact the District for approval prior to installation.
b. The District must evaluate location, materials and equipment prior to installation.
c. Only one power source is allowed per pole.
d.
e. Power source materials shall be evaluated prior to installation. All materials shall be UL approved for outdoor use.
f.
g. Weatherhead shall be 8" above District's neutral/secondary position and receptacle shall not be mounted lower than 12' above the ground.
Maximum power source shall be nominal 120 volt 20 amp GFCI protected double receptacle outlet.
The customer will provide an approved power source receptacle and District crews will install and provide power at customer’s expense.
E
Materials
A
Single entrance PVC molded outlet box, type FSE.
B
Weatherproof PVC receptable cover and gasket.
C
GFCI* 20 Amp receptacle.
D
3/4'' PVC conduit straps, two required.
H
E
Service entrance weatherhead, PVC.
F
Maximum 3/4'' PVC.
G
Galvanized steel nails or screws.
H
Three No. 12 cu. THW or better wire. 1- black,
1 - white, and 1 - green. 18'' minimum length
extending from weatherhead.
F
D G
Variable
*GFCI - Ground Fault Current Interupter
Figure 3-22
Unmetered Power Source
Materials
Electrical Service Requirements
New: 10/90
Revised 9/14/2015
Page 3 - 28
A B C